Myc knockout and wild-type mice (IMAGE) University of Pittsburgh Caption Mice lacking the gene Myc (left) have greyer coats and other signs of advanced aging compared to normal mice (right) of the same age Credit Taylor Stevens Usage Restrictions For use with press release License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.